ML20045B536
| ML20045B536 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 06/11/1993 |
| From: | Martin T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Antony D NORTHERN STATES POWER CO. |
| Shared Package | |
| ML20045B537 | List: |
| References | |
| NUDOCS 9306180049 | |
| Download: ML20045B536 (3) | |
See also: IR 05000282/1993007
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UNITED STATES
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JUN 111333
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Docket No. 50-282
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Docket No. 50-306
Northern States Power Company
ATTN: Mr. D. D. Antony
Vice President, Nuclear
Generation
414 Nicollet Mall
Minneapolis, MN 55401
Dear Mr. Antony:
This refers to the special electrical distribution system functional
inspection (EDSFI) conducted by Mr. Rolf A. Westberg and others of this office
on April 12 through May 14, 1993.
The inspection evaluated activities at the
Prairie Island Nuclear Generating Station, Units 1 and 2, authorized by NRC
Operating Licenses No. DPR-42 and No. DPR-60. We discussed our inspection
findings with Mr. M. Wadley and members of your staff at the exit interview on
May 14, 1993.
The team concluded that Prairie Island's electrical
distribution system (EDS) was designed, operated and maintained in an
effective manner. The team also concluded that Prairie Island's engineering
and technical function support was good.
The enclosed inspection report identifies areas examined during the
inspection. The team assessed the design, implementation, and engineering
technical support relative to the EDS.
The inspect'on reviewed selected
design calculations, relevant procedures, representative records, installed
equipment, and interviewed engineering and technical support staff.
Through its review activities, the team identified some. strengths and
weaknesses. Most notable among the strengths were robust EDS design;
competent, well qualified people with good plant knowledge; good plant
material condition; excellent EDS surveillances; and good self assessment
relative to the EDS. The recently completed installation of the D5 and D6
emergency diesel generators constituted a significant improvement to your EDS.
Minor weaknesses were identified relative to design and calculations.
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Various commitments were made as documented in the enclosed report to address
the concerns of the inspection team.
In addition, one followup item was
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identified in the report. This item and commitments will be reviewed during a
followup inspection.
During this inspection, one unresolved item (282/93007-02; 306/93007-02) was
identified regarding the lack of an analyses to demonstrate tornado
qualification of the EDG ventilation dampers. We request that you submit
within 60 days of the date of the letter transmitting this inspection report,
a written response detailing:
(1) the steps that will be taken to address the
damper issue; and (2) the date when the analyses will be completed.
,
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9306380049 930611
ADDCK 05000282
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Northern States Power Company
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No violations of NRC requirements were identified during the course of this
inspection.
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In accordance with 10 CFR 2.790 of the Commission's regulations, a copy of
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this letter and the enclosures will be placed in the NRC Public Document Room.
We will gladly discuss any questions you have concerning this inspection.
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Sincerely,
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T. O. Martin, Acting Director
Division of Reactor Safety
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Enclosures:
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1.
Inspection Reports
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No. 50-282/93007(DRS);
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No. 50-306/93007(DRS)
2.
Appendix A - Personnel
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Contacted
3.
Appendix B - Requests
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for Information
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See Attached Distribution
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Northern States Power Company
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JJN 111333
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Distribution
cc w/ enclosures:
E. L. Watzl, Site Manager,
Prairie Island Site
M. Wadley, Plant Manager
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Resident Inspector, RIII
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Prairie Island
Resident Inspector, RIII
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Monticello
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John W. Ferman, Ph.D. ,
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Nuclear Engineer, MPCA
Kris Sanda, Commissioner
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Minnesota Dept. of Public
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Service
Prairie Island LPM, NRR
Robert M. Thompson, Administrator
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WI Division of Emergency Government
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W. Hodges, RI
J. Durr, RI-
A. Gibson, RII
C. Julian, RII
S. Collins, RIV
T. Steka, RIV
K. Perkins, RV
L. Miller, RV
E. Imbro, NRR
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